Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/1649#discussion_r15595677
--- Diff: pom.xml ---
@@ -1015,7 +1016,6 @@
<id>hadoop-2.2</id>
<properties>
<hadoop.version>2.2.0</hadoop.version>
- <protobuf.version>2.5.0</protobuf.version>
--- End diff --
I think this would then cause the whole thing to be incompatible with
Hadoop 1.x. The akka version would have to go with the protobuf version of
Hadoop, so the newer version could only work with Hadoop 2.x+. I think this is
why akka's protobuf was shaded to begin with? Changing it to 2.5.0 globally
would again break Hadoop 1.
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